The author argues that American policymakers must take an approach based on "principled judgment" when deciding on the use of force. The 1990s showed the extremes of deciding when and how to use force, one of the central elements of strategy. Throughout American history, debate has raged over whether force is appropriate only in defense of the homeland and vital national interests or whether it should also be used to promote more expansive objectives like regional security and stopping humanitarian disasters in regions with few tangible U.S. interests. He concludes with a discussion of Army roles and requirements for future contingencies.